Research Article
Numerical Investigation of the Influence of Roof Fracturing Angle on the Stability of Gob-Side Entry Subjected to Dynamic Loading
Table 3
Parameters of the rock strata used in the model.
| Rock strata | Density (kg/m3) | Bulk modulus (GPa) | Shear modulus (GPa) | Friction angle (°) | Cohesion (MPa) | Tensile strength (MPa) |
| Sandy mudstone | 2360 | 4.56 | 2.8 | 32 | 1.8 | 0.46 | Aluminum mudstone | 2400 | 5.32 | 3.1 | 33 | 2 | 0.52 | Siltstone | 2500 | 6.33 | 4.38 | 34 | 2.3 | 0.44 | Sandy mudstone | 2360 | 4.56 | 2.8 | 32 | 1.8 | 0.46 | Fine sandstone | 2600 | 8.17 | 4.95 | 38 | 2.8 | 0.63 | Mudstone | 2250 | 1.53 | 1.26 | 30 | 1.6 | 0.42 | Siltstone | 2500 | 6.33 | 4.38 | 34 | 2.3 | 0.44 | Fine sandstone | 2600 | 8.17 | 4.95 | 38 | 2.8 | 0.63 | Mudstone | 2250 | 1.53 | 1.26 | 30 | 1.6 | 0.42 | Coal seam | 1400 | 1.42 | 1.15 | 28 | 1.5 | 0.3 | Mudstone | 2250 | 1.53 | 1.26 | 30 | 1.6 | 0.42 | Siltstone | 2500 | 6.33 | 4.38 | 34 | 2.3 | 0.44 | Fine sandstone | 2600 | 8.17 | 4.95 | 38 | 2.8 | 0.63 |
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